/*

* Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

* which accompanies this distribution, and is available

* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  CPosLmTextCriteria class

*

*/

#ifndef CPOSLMTEXTCRITERIA_H

#define CPOSLMTEXTCRITERIA_H

#include <e32base.h>

#include <LbsFields.h>

#include <EPos_CPosLandmark.h>

#include "EPos_CPosLmSearchCriteria.h"

const TInt KPosLmMaxSearchStringLength = 255;

/**

*  Criterion for searching for landmarks which contain a certain text.

*

*  The search is defined by providing a text to search for and the position

*  fields and text attributes to search.

*

*  If no attributes are specified for the search, all text attributes in the

*  landmarks are searched. If no position fields are specified, then all

*  fields are searched.

*

*  If this criterion is passed to

*  @ref CPosLandmarkSearch::StartLandmarkSearchL, only landmarks which contain

*  the specified text are returned.

*

*  Wild-card characters are supported.

*

*  This criterion is only valid when searching for landmarks, i.e. if it

*  is passed to @p CPosLandmarkSearch::StartCategorySearchL, the function

*  will fail with error code @p KErrArgument.

*

*  @lib eposlmsearchlib.lib

*  @since S60 3.0

*/

class CPosLmTextCriteria : public CPosLmSearchCriteria

    {

    public:

        /**

        * Two-phased constructor.

        * @returns A new instance of this class.

        */

        IMPORT_C static CPosLmTextCriteria* NewLC();

        /**

        * Destructor.

        */

        virtual ~CPosLmTextCriteria();

    public:

        /**

        * Retrieves the text to search for.

        *

        * @return The text to search for.

        */

        IMPORT_C TPtrC Text() const;

        /**

        * Sets the search string.

        *

        * A non-empty text string must be set, otherwise

        * @ref CPosLandmarkSearch::StartLandmarkSearchL will leave with error

        * code @p KErrArgument.

        *

        * The search is case insensitive.

        *

        * Wild-card characters "?" and "*" are supported in the search string.

        * "?" matches a single occurrence of any character and "*" matches

        * zero or more consecutive occurrences of any characters.

        *

        * A landmark matches the criterion if specified text is found anywhere

        * in selected attributes or position fields.

        *

        * @param aText The text to search for.

        *

        * @leave KErrArgument The search string is longer than @p KPosLmMaxSearchStringLength.

        */

        IMPORT_C void SetTextL( const TDesC& aText );

        /**

        * Retrieves the landmark attributes which should be searched.

        *

        * This function returns a bitmap of landmark attributes. The landmark

        * attributes are defined by @p CPosLandmark::_TAttributes. It is only

        * possible to search the @p ELandmarkName and @p EDescription

        * attributes.

        *

        * @return A bitmap indicating which landmark attributes should be

        *   searched.

        */

        IMPORT_C CPosLandmark::TAttributes AttributesToSearch() const;

        /**

        * Sets which landmark attributes to search.

        *

        * The client passes a bitmap of the landmark attributes to search. It

        * is only possible to search the @p ELandmarkName and @p EDescription

        * attributes.

        *

        * @param aAttributes A bitmap indicating which landmark attributes

        *   should be searched.

        *

        * @panic "Landmarks Client"-EPosInvalidLandmarkAttribute

        *   Unsupported attribute is passed.

        */

        IMPORT_C void SetAttributesToSearch(

            CPosLandmark::TAttributes aAttributes

        );

        /**

        * Retrieves a list of the position fields to search.

        *

        * @param[out] aFieldArray On return, contains a list of the position fields

        *   which are used in a search. If no position fields have been set,

        *   the array is empty. Position fields are identified by values defined

        *   in @p TPositionFieldId.

        */

        IMPORT_C void GetPositionFieldsToSearchL(

            RArray<TUint>& aFieldArray

        ) const;

        /**

        * Sets the position fields to search.

        *

        * Any previously set position fields are cleared by this call.

        *

        * @param[in] aFieldArray A list of the position fields to search.

        *   Position fields are identified by values defined in

        *   @p TPositionFieldId.

        */

        IMPORT_C void SetPositionFieldsToSearchL(

            const RArray<TUint>&  aFieldArray

        );

        /**

        * Clears the position fields list used in a search.

        */

        IMPORT_C void ClearPositionFieldsToSearch();

    private:

        CPosLmTextCriteria();

        void ConstructL();

        // Prohibit copy constructor

        CPosLmTextCriteria( const CPosLmTextCriteria& );

        // Prohibit assigment operator

        CPosLmTextCriteria& operator= ( const CPosLmTextCriteria& );

    private:

        HBufC*                      iText;

        RArray<TUint>               iPositionFieldArray;

        CPosLandmark::TAttributes   iAttributes;

    };

#endif      // CPOSLMTEXTCRITERIA_H